Can I select just the black line drawing on white and put it on a layer with transparent background?

I have a drawing, black ink on white background I have scanned and now would like to overlay just the drawing onto a photograph. To do that, I will need to 'lift' just the black drawing lines out of the white background so I can then paste just the line drawing onto its own layer. The magic wand tool is not doing a very good job at all, is there a way to best select just the black line drawing itself that would preserve it fairly well in order to do this?